GHSA-2g8v-grq3-hq2g
Mattermost doesn't enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 11.7.0, < 11.7.1 | 11.7.1 |
| Go | github.com/mattermost/mattermost-server | >= 11.6.0, < 11.6.3 | 11.6.3 |
| Go | github.com/mattermost/mattermost-server | >= 11.5.0, < 11.5.6 | 11.5.6 |
| Go | github.com/mattermost/mattermost-server | >= 10.11.0, < 10.11.18 | 10.11.18 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler, which allows any authenticated user to overwrite the global default GitLab instance configuration via the {{/gitlab connect <instance-name>}} slash command.. Mattermost Advisory ID: MMSA-2026-00644
References
External links from the advisory. They lead to third-party sites.